diff --git a/osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs b/osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs
index 7cfca31167..90263e9deb 100644
--- a/osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs
+++ b/osu.Game.Tests/Visual/Online/TestSceneChatOverlay.cs
@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
@@ -85,6 +86,21 @@ namespace osu.Game.Tests.Visual.Online
                         case JoinChannelRequest joinChannel:
                             joinChannel.TriggerSuccess();
                             return true;
+
+                        case GetUserRequest getUser:
+                            if (getUser.Lookup.Equals("some body", StringComparison.OrdinalIgnoreCase))
+                            {
+                                getUser.TriggerSuccess(new User()
+                                {
+                                    Username = "some body",
+                                    Id = 1,
+                                });
+                            }
+                            else
+                            {
+                                getUser.TriggerFailure(new Exception());
+                            }
+                            return true;
                     }
 
                     return false;
@@ -322,6 +338,27 @@ namespace osu.Game.Tests.Visual.Online
             AddAssert("Current channel is channel 1", () => currentChannel == channel1);
         }
 
+        [Test]
+        public void TestChatCommand()
+        {
+            AddStep("Join channel 1", () => channelManager.JoinChannel(channel1));
+            AddStep("Select channel 1", () => clickDrawable(chatOverlay.TabMap[channel1]));
+
+            AddStep("Open chat with user.", () => channelManager.PostCommand("chat some body"));
+            AddAssert("PM channel is selected", () =>
+                channelManager.CurrentChannel.Value.Type == ChannelType.PM && channelManager.CurrentChannel.Value.Users.Single().Username == "some body");
+
+            AddStep("Open chat with non-existant user", () => channelManager.PostCommand("chat nobody"));
+            AddAssert("Last message is error", () => channelManager.CurrentChannel.Value.Messages.Last().GetType() == typeof(ErrorMessage));
+
+            // Make sure no unnecessary requests are made when the PM chanenl is already open.
+            AddStep("Select channel 1", () => clickDrawable(chatOverlay.TabMap[channel1]));
+            AddStep("Unregister request handling", () => ((DummyAPIAccess)API).HandleRequest = null);
+            AddStep("Open chat with user.", () => channelManager.PostCommand("chat some body"));
+            AddAssert("PM channel is selected", () =>
+                channelManager.CurrentChannel.Value.Type == ChannelType.PM && channelManager.CurrentChannel.Value.Users.Single().Username == "some body");
+        }
+
         private void pressChannelHotkey(int number)
         {
             var channelKey = Key.Number0 + number;